/jp/ - Otaku Culture

My prediction for the resolution

What we saw was, in fact, a youkai from the scroll exerting power through Kosuzu, and not Kosuzu herself turned youkai. However, her words were still her own, and after the threat is exterminated and Kosuzu returned to her senses she confronts Reimu. As Yukari took her on a trip there as Aya guessed, Kosuzu demands that Gensokyo become more like the outside world, or the villagers be allowed to choose to go live there if they wish.
Either Reimu in a rare moment of wisdom, or some other character involved (Mamizou or Yukari herself, maybe) will point out that even though youkai are far less powerful in the outside world, human lives are still fraught with hardship, danger and sources of fear; they're just of a different sort than what the humans of Gensokyo are used to. Kosuzu is given the choice to go live in the outside world or remain; of course she chooses the latter because she still feels attachment to her family and friends.